CN220926833U

CN220926833U - Movable smoke hood lifting device in converter waste heat boiler

Info

Publication number: CN220926833U
Application number: CN202322765010.1U
Authority: CN
Inventors: 卢春燕; 范科; 张卫兵; 陆亚虎
Original assignee: Suzhou Hailu Heavy Industry Co Ltd
Current assignee: Suzhou Hailu Heavy Industry Co Ltd
Priority date: 2023-10-16
Filing date: 2023-10-16
Publication date: 2024-05-10
Anticipated expiration: 2033-10-16

Abstract

The utility model discloses a movable smoke hood lifting device in a converter waste heat boiler, which comprises: the movable smoke hood, the left semi-annular lifting ring beams of the left L-shaped lifting arms are circumferentially arranged at intervals at the bottom, and the right semi-annular lifting ring beams of the right L-shaped lifting arms are circumferentially arranged at intervals at the bottom; each left L-shaped lifting arm and each left semi-annular lifting ring beam are fixedly arranged on the left outer wall of the movable smoke hood, and each right L-shaped lifting arm and each right semi-annular lifting ring beam are fixedly arranged on the right outer wall of the movable smoke hood; and a cooling waterway is arranged among the left semi-annular lifting ring beam, the right semi-annular lifting ring beam, each left L-shaped lifting arm and each right L-shaped lifting arm. The device can avoid high-temperature deformation of the movable smoke hood lifting device caused by high-temperature smoke, ensure stable lifting of the movable smoke hood, prevent the movable smoke hood from being locally overheated caused by splashed slag, and prolong the service lives of the movable smoke hood lifting device and the movable smoke hood.

Description

Movable smoke hood lifting device in converter waste heat boiler

Technical Field

The utility model relates to a converter waste heat boiler, in particular to a movable smoke hood lifting device in the converter waste heat boiler.

Background

The converter waste heat boiler is a flue type waste heat boiler and is widely applied to recovering heat in coal gas, high-temperature flue gas and smoke dust generated during converter steelmaking in a steel plant.

In the operation process, the working condition of the converter waste heat boiler periodically and sharply changes along with the smelting process of the converter: when the converter blows, a large amount of high-temperature flue gas flows through the waste heat boiler, and the heat load of the waste heat boiler is increased sharply; when converting is stopped, the heat load of the waste heat boiler is drastically reduced; such severe operating conditions necessarily have an impact on the service life of the waste heat boiler. At present, the service life of the converter waste heat boiler is very short, especially the first part at the inlet of the furnace mouth, namely the movable smoke hood, the operation condition is extremely bad, and the service life is only about 1 year; in addition, even in the life-span, the movable fume hood also often can appear leaking, phenomenon such as sediment, forces the steel mill to shut down the stove and refurbish, has influenced the production progress greatly, increases the danger of maintenance work.

The movable fume hood is required to be matched with the movable fume hood lifting device, the purpose that the movable fume hood ascends or descends along the fume channel of the furnace mouth section is achieved through the movable fume hood lifting device, so that the distance between the movable fume hood and the furnace mouth of the converter is adjusted, the movable fume hood descends to the lowest position during the recovery period of the gas produced by oxygen blowing smelting of the converter, and the gap between the movable fume hood and the furnace mouth of the converter is usually less than or equal to 100mm. At present, 2 structures of the movable smoke hood lifting device on the movable smoke hood are commonly used, one is of an L-shaped structure, the other is of a wing-shaped structure, and the 2 structures have advantages and disadvantages.

The movable smoke hood lifting device with the L-shaped structure is relatively simple to manufacture, and after conventional manufacture is completed, refractory materials are coated on the periphery of the lifting device and the lifting ring beam to ensure that the movable smoke hood is not baked and deformed by smoke and is not beneficial to lifting of the movable smoke hood lifting device when the movable smoke hood is operated. However, due to the fact that the temperature of the smoke is high, generally about 1600 ℃, the coated refractory materials of the movable smoke hood lifting device are easy to bake and fall off, the movable smoke hood lifting device is deformed and cannot be lifted, and the service life of the whole structure of the movable smoke hood is seriously influenced.

The movable smoke hood lifting device with the wing structure is relatively complicated and complex in manufacturing, has a large special size and can be ultra-wide in transportation, so that the movable smoke hood lifting device can only be disconnected in the middle in the production and processing process, and is butted into a whole after being transported to the site, thereby not only wasting manpower, but also possibly generating welding shrinkage deformation during butt joint and influencing the lifting point position of the movable smoke hood lifting device.

Disclosure of utility model

The technical problems to be solved by the utility model are as follows: the movable fume hood lifting device in the converter waste heat boiler is simple to manufacture and long in service life.

In order to solve the problems, the utility model adopts the following technical scheme: the movable fume hood lifting device in the converter waste heat boiler comprises: the movable smoke hood, the left semi-annular lifting ring beam and the right semi-annular lifting ring beam; a plurality of left L-shaped lifting arms are circumferentially arranged at intervals at the bottom of the left semi-annular lifting ring beam, and each left L-shaped lifting arm and each left semi-annular lifting ring beam are fixedly arranged on the left outer wall of the movable smoke hood, so that each left L-shaped lifting arm and each left semi-annular lifting ring beam encircle the periphery of the left outer wall of the movable smoke hood; a plurality of right L-shaped lifting arms are circumferentially arranged at intervals at the bottom of the right semi-annular lifting ring beam, and each right L-shaped lifting arm and each right semi-annular lifting ring beam are fixedly arranged on the right outer wall of the movable smoke hood, so that each right L-shaped lifting arm and each right semi-annular lifting ring beam encircle the periphery of the right outer wall of the movable smoke hood; and cooling waterways for cooling the left semi-annular lifting ring beam, the right semi-annular lifting ring beam, the left L-shaped lifting arms and the right L-shaped lifting arms are arranged among the left semi-annular lifting ring beam, the right semi-annular lifting ring beam, the left L-shaped lifting arms and the right L-shaped lifting arms.

In this scheme, the structure of cooling water route be: a first water outlet is formed in the front side end surface of the left semi-annular lifting ring beam, a first water inlet is formed in the front side end surface of the right semi-annular lifting ring beam, and the first water outlet is communicated with the first water inlet through a front connecting bent pipe; a second water outlet is formed in the rear side end surface of the left semi-annular lifting ring beam, a second water inlet is formed in the rear side end surface of the right semi-annular lifting ring beam, and the second water outlet is communicated with the second water inlet through a rear connecting elbow;

The left water stop plate is vertically arranged in the middle of the cavity of the left semi-annular lifting ring beam and divides the cavity of the left semi-annular lifting ring beam into a front cavity and a rear cavity which are independent: a first front cavity and a first rear cavity; the outer wall of the left semi-annular lifting ring beam is provided with a first connecting port communicated with the first front cavity and a second connecting port communicated with the first rear cavity, and the first connecting port and the second connecting port are respectively communicated with a water outlet of the water inlet header through water inlet connecting pipes;

The right water stop plate is vertically arranged in the middle of the cavity of the right semi-annular lifting ring beam and divides the cavity of the right semi-annular lifting ring beam into a front cavity and a rear cavity which are independent: the outer wall of the right semi-annular lifting ring beam is provided with a third connecting port communicated with the second front cavity and a fourth connecting port communicated with the second rear cavity, and the third connecting port and the fourth connecting port are respectively communicated with a water inlet of the water outlet header through a water outlet connecting pipe;

the structure of each left L-shaped lifting arm is as follows: the vertical connecting arm of left part L type lifting arm and the cavity in the horizontal connecting arm constitute the first L type cavity with the cavity intercommunication of left part semi-annular lifting ring roof beam, are provided with first water proof sheet in first L type cavity, and two cavities around first L type cavity separates into with first water proof sheet: a first forward cooling cavity and a first aft cooling cavity; the first water stop in the vertical connecting arm of the left L-shaped lifting arm extends upwards into the inner cavity of the left semi-annular lifting ring beam to be separated, so that the first front cooling cavity is communicated with the inner cavity of the left semi-annular lifting ring beam positioned on the front side of the first water stop, and the first rear cooling cavity is communicated with the inner cavity of the left semi-annular lifting ring beam positioned on the rear side of the first water stop; a first gap is reserved between the vertical end part of a first water stop plate in the horizontal connecting arm of the left L-shaped lifting arm and the inner cavity wall of the horizontal connecting arm of the left L-shaped lifting arm, and the first front cooling cavity and the first rear cooling cavity are communicated through the first gap;

The structure of each right L-shaped lifting arm is as follows: the vertical connecting arm of right part L type lifting arm and the cavity in the horizontal connecting arm constitute the second L type cavity with the cavity intercommunication of right part semi-annular lifting ring roof beam, are provided with the second water proof sheet in the second L type cavity, and the second water proof sheet separates into two front and back cavities with the second L type cavity: a second forward cooling cavity and a second aft cooling cavity; the second water stop in the vertical connecting arm of the right L-shaped lifting arm extends upwards into the inner cavity of the right semi-annular lifting ring beam to be separated, so that the second front cooling cavity is communicated with the inner cavity of the right semi-annular lifting ring beam positioned at the front side of the second water stop, and the second rear cooling cavity is communicated with the inner cavity of the right semi-annular lifting ring beam positioned at the rear side of the second water stop; a second gap is reserved between the vertical end part of a second water stop plate positioned in the horizontal connecting arm of the right L-shaped lifting arm and the inner cavity wall of the horizontal connecting arm of the right L-shaped lifting arm, and the second front cooling cavity is communicated with the second rear cooling cavity through the second gap.

In order to ensure that the cooling water in the cooling water path can not be vaporized, the scheme is as follows: the deaerator is connected with a water inlet of the water inlet header through a water inlet pipeline.

In order to ensure uniform cooling water distribution, in the scheme, the left water stop plate is positioned on the vertical symmetrical central plane of the left semi-annular lifting ring beam, and the right water stop plate is positioned on the vertical symmetrical central plane of the right semi-annular lifting ring beam.

Further, in the movable hood lifting device in the converter exhaust-heat boiler, an included angle α between a front side end face and a rear side end face of the left semi-annular lifting ring beam is 114°±2°, and an included angle β between a front side end face and a rear side end face of the right semi-annular lifting ring beam is 114°±2°.

Further, the movable smoke hood lifting device in the converter waste heat boiler comprises a water inlet connecting pipe and a water outlet connecting pipe, wherein the water inlet connecting pipe is formed into a whole by a first connecting pipe, a middle connecting pipe and a second connecting pipe, the first connecting pipe is of a round pipe structure with consistent outer pipe diameters, the middle connecting pipe is of a round pipe structure, and the second connecting pipe is of a round pipe structure with consistent outer pipe diameters; the outer diameter of the first connecting pipe is smaller than that of the second connecting pipe, the outer diameter of the small end of the middle connecting pipe is equal to that of the first connecting pipe, the outer diameter of the large end of the middle connecting pipe is equal to that of the second connecting pipe, and the pipe wall thicknesses of the first connecting pipe, the middle connecting pipe and the second connecting pipe are all the same; a throttling orifice plate is fixedly arranged at the end part of the first connecting pipe, a through hole on the throttling orifice plate is composed of a cylindrical channel hole and a truncated cone-shaped channel hole, the small end of the truncated cone-shaped channel hole is the same as the aperture of the cylindrical channel hole, and the small end of the truncated cone-shaped channel hole is in butt joint with the cylindrical channel hole; an inner connecting pipe is arranged in the first connecting pipe and is fixed on the throttling orifice plate, and a gap is reserved between the outer wall of the inner connecting pipe and the inner pipe wall of the first connecting pipe; the large end of the truncated cone-shaped channel hole faces to the inner connecting pipe; the pipe inner channel of the inner connecting pipe is composed of a cylindrical channel and a truncated cone-shaped channel, and the large end of the truncated cone-shaped channel faces the middle connecting pipe; the cylindrical channel hole, the circular truncated cone-shaped channel hole, the cylindrical channel, the circular truncated cone-shaped channel, the internal connecting pipe and the first connecting pipe are all positioned on the same axis; the orifice plate is fixedly connected to the water outlet of the water inlet header in a sealing manner, and the second connecting pipe is fixedly connected to the first connecting port or the second connecting port in a sealing manner.

In the process that the movable smoke hood is lifted up and down along the flue of the furnace mouth section, the movable smoke hood is in rolling contact with the flue of the furnace mouth section optimally, and guide wheel structures are arranged at the top of each left L-shaped lifting arm and the top of each right L-shaped lifting arm; the guide wheel structure is as follows: the top of the corresponding left L-shaped lifting arm or the corresponding right L-shaped lifting arm is provided with a guide wheel seat, a shaft sleeve is embedded in a connecting hole of a guide wheel and then movably sleeved on a guide wheel shaft, and the guide wheel shaft is supported in the guide wheel seat; in the process of lifting the movable smoke cover up and down, the guide wheel rolls along the outer wall of the flue of the furnace mouth section positioned at the movable smoke cover.

Further, the movable fume hood lifting device in the converter waste heat boiler, wherein the fixed mounting structure of the left semi-annular lifting ring beam and the right semi-annular lifting ring beam fixedly mounted on the outer wall of the movable fume hood is as follows: a plurality of first connecting plates are fixedly welded on the left semi-annular lifting ring beam and the right semi-annular lifting ring beam respectively, first lifting rib plates are fixedly welded on the outer wall of the movable smoke hood corresponding to the positions of the first connecting plates respectively, and each first connecting plate is fixedly connected with the corresponding first lifting rib plate through a plurality of first detachable bolt and nut fasteners; each left L-shaped lifting arm and each right L-shaped lifting arm are fixedly arranged on the outer wall of the movable smoke hood, and the fixed installation structure is as follows: a plurality of second connecting plates are fixedly welded on each left L-shaped lifting arm and each right L-shaped lifting arm respectively, second lifting rib plates are fixedly welded on the outer wall of the movable smoke hood corresponding to the positions of each second connecting plate respectively, and each second connecting plate is fixedly connected with the corresponding second lifting rib plates through a plurality of second detachable bolt and nut fasteners.

Further, in the movable smoke hood lifting device in the converter exhaust-heat boiler, the tortoise shell nets are attached to the first lifting rib plates and the second lifting rib plates, refractory materials are coated on the tortoise shell nets, and then the first lifting rib plates and the second lifting rib plates are protected.

The beneficial effects of the utility model are as follows: cooling water enters from the inlet header, and cools the left semi-annular lifting ring beam, the right semi-annular lifting ring beam, each left L-shaped lifting arm and each right L-shaped lifting arm through water circulation, so that the problem of stress concentration caused by local overheating of the movable smoke hood due to splashed slag is avoided, the service lives of the movable smoke hood lifting device and the movable smoke hood are greatly prolonged, and the service lives of the movable smoke hood lifting device and the movable smoke hood can reach about two years generally.

Drawings

Fig. 1 is a schematic structural view of a movable hood lifting device mounted on a movable hood in a converter waste heat boiler according to the present utility model.

Fig. 2 is a partially enlarged schematic view of the portion B in fig. 1.

Fig. 3 is a schematic view of the structure in the cross-section D-D of fig. 2.

Fig. 4 is a partial structural schematic diagram of the E-E cross-section of fig. 1.

Fig. 5 is a schematic view of the mobile smoke cage lifting device of fig. 1.

Fig. 6 is a partially enlarged schematic view of the portion C in fig. 1.

Fig. 7 is a partially enlarged schematic view of any one of the left L-shaped lift arms of fig. 1.

Fig. 8 is a partially enlarged schematic view of the right L-shaped lift arm of fig. 1.

Fig. 9 is a schematic view of the structure in the cross-section A-A of fig. 1.

Fig. 10 is a partially enlarged schematic structural view of fig. 9.

Fig. 11 is a partially enlarged schematic structural view of the portion F in fig. 10.

Detailed Description

The technical scheme of the utility model is further described in detail below with reference to the attached drawings and the preferred embodiments.

For convenience of description, this embodiment is defined as "left" in the left-hand direction in fig. 9, as "right" in the right-hand direction in fig. 8, and as "back-to-front" in the direction of the paper surface in fig. 9, all the directional terms "left", "right", "front", "back" in the present application are defined as such.

Example 1

The movable hood lifting device in the converter exhaust-heat boiler in this embodiment, as shown in fig. 1 and 9, includes: the movable smoke hood 1, a left semi-annular lifting ring beam 2 and a right semi-annular lifting ring beam 3.

A plurality of left L-shaped lifting arms 4 are circumferentially arranged at intervals at the bottom of the left semi-annular lifting ring beam 2, and each left L-shaped lifting arm 4 and each left semi-annular lifting ring beam 2 are fixedly arranged on the left outer wall of the movable hood 1, so that each left L-shaped lifting arm 4 and each left semi-annular lifting ring beam 2 encircle the periphery of the left outer wall of the movable hood 1. In this embodiment, as shown in fig. 5, the angle α between the front side end surface 21 and the rear side end surface 22 of the left semi-annular lifting ring beam 2 is preferably 114 ° ± 2 °, wherein α is optimally selected to be 114 °. The number of the left L-shaped lifting arms 4 is preferably two, and the two left L-shaped lifting arms 4 are symmetrically arranged front and back relative to the vertical symmetrical center surface of the left semi-annular lifting ring beam 2.

A plurality of right L-shaped lifting arms 5 are circumferentially arranged at intervals at the bottom of the right semi-annular lifting ring beam 3, and each right L-shaped lifting arm 5 and each right semi-annular lifting ring beam 3 are fixedly arranged on the right outer wall of the movable hood 1, so that each right L-shaped lifting arm 5 and each right semi-annular lifting ring beam 3 encircle the periphery of the right outer wall of the movable hood 1. In this embodiment, as shown in fig. 5, the angle β between the front side end face 31 and the rear side end face 32 of the right semi-annular lifting ring beam 3 is preferably 114++2°, where β is optimally 114 °. The number of the right L-shaped lifting arms 5 is preferably two, and the two right L-shaped lifting arms 5 are symmetrically arranged front and back relative to the vertical symmetrical center surface of the right semi-annular lifting ring beam 3.

Cooling waterways for cooling the left semi-annular lifting ring beam 2, the right semi-annular lifting ring beam 3, the left L-shaped lifting arms 4 and the right L-shaped lifting arms 5 are arranged among the left semi-annular lifting ring beam 2, the right semi-annular lifting ring beam 3, the left L-shaped lifting arms 4 and the right L-shaped lifting arms 5.

The left semi-annular lifting ring beam 2, the right semi-annular lifting ring beam 3, the left L-shaped lifting arms 4 and the right L-shaped lifting arms 5 are cooled through the cooling waterways, so that the problem that the left semi-annular lifting ring beam 2, the right semi-annular lifting ring beam 3, the left L-shaped lifting arms 4 and the right L-shaped lifting arms 5 are baked by silver high-temperature flue gas to cause high-temperature deformation of the left semi-annular lifting ring beam 2, the right semi-annular lifting ring beam 3, the left L-shaped lifting arms 4 and the right L-shaped lifting arms 5 is avoided, the movable smoke hood can be stably lifted, and in addition, the problem that the movable smoke hood is locally overheated due to splashed slag is avoided, and the service lives of the movable smoke hood lifting device and the movable smoke hood are greatly prolonged.

The movable hood 1 descends to the lowest position during the gas recovery period of converter oxygen blowing smelting, and the gap between the movable hood 1 and the converter mouth is usually less than or equal to 100mm. When the furnace is rocked, the movable smoke cover 1 rises to a high position. The vertical stroke of the movable hood 1 is 500-750 mm.

In the embodiment, guide wheel structures are mounted at the top of each left L-shaped lifting arm 4 and the top of each right L-shaped lifting arm 5, and rolling friction is formed between the movable hood 1 and the furnace mouth section flue in the process that the movable hood 1 ascends or descends along the furnace mouth section flue. As shown in fig. 9, 10 and 11, the guide wheel structure is as follows: the top of the corresponding left L-shaped lifting arm 4 or the corresponding right L-shaped lifting arm 5 is provided with a guide wheel seat 9, a connecting hole of the guide wheel 91 is internally sleeved with a shaft sleeve and then movably sleeved on a guide wheel shaft 92, and the guide wheel shaft 92 is supported in the guide wheel seat 9. In the process that the movable hood 1 is lifted up and down along the flue of the furnace mouth section, the guide wheel 91 rolls along the outer wall of the flue of the furnace mouth section positioned at the movable hood 1.

In this embodiment, as shown in fig. 4, 7 and 8, the fixed mounting structure of the left semi-annular lifting ring beam 2 and the right semi-annular lifting ring beam 3 fixedly mounted on the outer wall of the movable hood 1 is as follows: a plurality of first connecting plates 100 are fixedly welded on the left semi-annular lifting ring beam 2 and the right semi-annular lifting ring beam 3 respectively, first lifting rib plates 11 are fixedly welded on the outer wall of the movable hood 1 corresponding to the positions of the first connecting plates 100 respectively, and the first connecting plates 100 are fixedly connected with the corresponding first lifting rib plates 11 through a plurality of first detachable bolt and nut fasteners.

In this embodiment, as shown in fig. 10, the fixed mounting structure of each left L-shaped lift arm 4 and each right L-shaped lift arm 5 fixedly mounted on the outer wall of the movable hood 1 is: a plurality of second connecting plates 200 are respectively fixedly welded on each left L-shaped lifting arm 4 and each right L-shaped lifting arm 5, second lifting rib plates 12 are respectively fixedly welded on the outer wall of the movable hood 1 corresponding to the positions of the second connecting plates 200, and the second connecting plates 200 are fixedly connected with the corresponding second lifting rib plates 12 through a plurality of detachable second bolt and nut fasteners.

In this embodiment, the first lifting rib plate 11 and the second lifting rib plate 12 are both attached with a tortoise shell net, and the tortoise shell net is coated with a refractory material for protecting the first lifting rib plate 11 and the second lifting rib plate 12.

Through the design of the fixed mounting structure of the left semi-annular lifting ring beam 2 and the right semi-annular lifting ring beam 3 fixedly mounted on the outer wall of the movable hood 1 and the design of the fixed mounting structure of the left L-shaped lifting arms 4 and the right L-shaped lifting arms 5 fixedly mounted on the outer wall of the movable hood 1, the adjustability of the movable hood 1 during transportation is ensured.

Example two

The first embodiment is based on the first embodiment, and the cooling waterway is designed, so that the service lives of the movable hood lifting device and the movable hood 1 are further prolonged, and the movable hood 1 is ensured to be lifted more stably.

As shown in fig. 1, the cooling water path in this embodiment has the following structure: the front side end surface 21 of the left semi-annular lifting ring beam 2 is provided with a first water outlet 23, the front side end surface of the right semi-annular lifting ring beam 3 is provided with a first water inlet 33, and the first water outlet 23 is communicated with the first water inlet 33 through a front connecting bent pipe 61. A second water outlet 24 is formed in the rear side end surface 22 of the left semi-annular lifting ring beam 2, a second water inlet 34 is formed in the rear side end surface 32 of the right semi-annular lifting ring beam 3, and the second water outlet 24 is communicated with the second water inlet 34 through a rear connecting bent pipe 62.

As shown in fig. 1 and 2, a left water stop 25 is vertically arranged in the middle of the cavity of the left semi-annular lifting ring beam 2, and the left water stop 25 divides the cavity of the left semi-annular lifting ring beam 2 into two independent cavities, namely, a front cavity and a rear cavity: a first front cavity 251 and a first rear cavity 252. The outer wall of the left semi-annular lifting ring beam 2 is provided with a first connecting port 261 communicated with the first front cavity 251 and a second connecting port 262 communicated with the first rear cavity 252, and the first connecting port 261 and the second connecting port 262 are respectively communicated with a water outlet of the water inlet header 71 through a water inlet connecting pipe 7.

The water supply temperature of the water inlet header 71 is 104 ℃ generally, the water vapor saturation temperature of the outlet is 184-192 ℃ generally when the movable hood 1 operates, the working pressure of the movable hood is 1.0-1.2 MPa, and the water in the cooling waterway can not be vaporized, so that the deaerator is additionally arranged in the scheme and is connected with the water inlet of the water inlet header 71 through a water inlet pipeline.

As shown in fig. 1 and 6, a right water stop plate 35 is vertically arranged in the middle of the cavity of the right semi-annular lifting ring beam 3, and the right water stop plate 35 separates the cavity of the right semi-annular lifting ring beam 3 into two independent cavities: a third connection port 362 communicated with the second front cavity 351 and a fourth connection port 362 communicated with the second rear cavity 352 are formed on the outer wall of the right semi-annular lifting ring beam 3, and the third connection port 361 and the fourth connection port 362 are respectively communicated with a water inlet of the water outlet header 81 through a water outlet connecting pipe 8.

As shown in fig. 1, 7 and 9, each left L-shaped lift arm 4 has a structure in which: the cavities in the vertical connecting arm 41 and the horizontal connecting arm 42 of the left L-shaped lifting arm 4 form a first L-shaped cavity communicated with the cavity of the left semi-annular lifting ring beam 2, a first water stop plate 43 is arranged in the first L-shaped cavity, and the first water stop plate 43 divides the first L-shaped cavity into a front cavity and a rear cavity: a first forward cooling cavity 431 and a first aft cooling cavity 432. The first water stop 43 in the vertical connecting arm 41 of the left L-shaped lifting arm 4 extends upward into the inner cavity in the left semi-annular lifting ring beam 2 to divide, so that the first front cooling cavity 431 is communicated with the inner cavity in the left semi-annular lifting ring beam 2 at the front side of the first water stop 43, and the first rear cooling cavity 432 is communicated with the inner cavity in the left semi-annular lifting ring beam 2 at the rear side of the first water stop 43. A first gap 44 is left between the vertical end 433 of the first water baffle 43 in the horizontal connecting arm 42 of the left L-shaped lift arm 4 and the inner cavity wall of the horizontal connecting arm of the left L-shaped lift arm 4, and the first front cooling cavity 431 and the first rear cooling cavity 432 are communicated through the first gap 44.

For convenience of description, in this embodiment, a left L-shaped lifting arm 4 is disposed on each of the front half and the rear half of the left semi-annular lifting ring beam 2: the first left L-shaped lift arm 401 and the second left L-shaped lift arm 402 are described as examples. The cooling water adopts forced circulation, and the cooling water output from the water inlet header 71 has two paths:

One path is that the water inlet connecting pipe 7 corresponding to the first connecting port 261 enters the first half cavity of the left semi-annular lifting ring beam 2, namely the first front cavity 251 between the first water stop plate 43 of the first left L-shaped lifting arm 401 and the left water stop plate 25. Next, the cooling water introduced into the first front cavity 251 between the first water stop 43 and the left water stop 25 of the first left L-shaped lift arm 401 flows through the first rear cooling cavity 432, the first gap 44, and the first front cooling cavity 431 of the first left L-shaped lift arm 401 in this order, and then enters the first front cavity 251 in front of the first water stop 43 of the first left L-shaped lift arm 401, and is then transferred to the second front cavity 351 of the right semi-annular lift ring beam 3 via the front connecting elbow 61.

The other path enters the cavity of the rear half part of the left semi-annular lifting ring beam 2 through the water inlet connecting pipe 7 corresponding to the second connecting port 262, namely, the first rear cavity 252 between the first water stop plate 43 and the left water stop plate 25 of the second left L-shaped lifting arm 402. Then, the cooling water introduced into the first rear cavity 252 between the first water stop 43 and the left water stop 25 of the second left L-shaped lift arm 402 flows through the first front cooling cavity 431, the first gap 44, and the first rear cooling cavity 432 of the second left L-shaped lift arm 402 in this order, and then enters the first rear cavity 251 behind the first water stop 43 of the second left L-shaped lift arm 402, and is then transferred to the second rear cavity 352 of the right semi-annular lift ring beam 3 via the rear connecting elbow 62.

As shown in fig. 1, 8 and 9, each right L-shaped lift arm 5 has a structure in which: the cavities in the vertical connecting arm 51 and the horizontal connecting arm 52 of the right L-shaped lifting arm 5 form a second L-shaped cavity communicated with the cavity of the right semi-annular lifting ring beam 3, a second water stop plate 53 is arranged in the second L-shaped cavity, and the second water stop plate 53 divides the second L-shaped cavity into a front cavity and a rear cavity: a second forward cooling cavity 531 and a second aft cooling cavity 532. The second riser 53 in the vertical connecting arm 51 of the right L-shaped lifting arm 5 extends upward into the inner cavity in the right semi-annular lifting ring beam 3 to divide, so that the second front cooling cavity 531 communicates with the inner cavity in the right semi-annular lifting ring beam 3 on the front side of the second riser 53, and the second rear cooling cavity 532 communicates with the inner cavity in the right semi-annular lifting ring beam 3 on the rear side of the second riser 53. A second gap 54 is left between the vertical end 533 of the second water baffle 53 in the horizontal connecting arm 52 of the right L-shaped lift arm 5 and the inner cavity wall of the horizontal connecting arm of the right L-shaped lift arm 5, and the second front cooling cavity 531 and the second rear cooling cavity 532 are communicated through the second gap 54.

For convenience of description, in this embodiment, a right L-shaped lifting arm 5 is disposed on each of the front half and the rear half of the right semi-annular lifting ring beam 3: the first right L-shaped lift arm 501 and the second right L-shaped lift arm 502 are described as examples.

The cooling water delivered to the second front cavity 351 of the right semi-annular lifting ring beam 3 through the front connecting elbow 61 is located in the second front cavity 251 in front of the second water baffle 53 of the first right L-shaped lifting arm 501, then flows through the second front cavity 351, the second gap 54 and the second rear cavity 352 of the first right L-shaped lifting arm 501 in sequence, enters the second front cavity 251 between the second water baffle 53 and the right water baffle 35 of the first right L-shaped lifting arm 501, and then flows into the water outlet header 81 through the water outlet connecting pipe 8 corresponding to the third connecting port 361.

The cooling water delivered to the second rear cavity 352 of the right semi-annular lifting ring beam 3 through the rear connecting elbow 62 is located in the second rear cavity 251 behind the second water stop 53 of the second right L-shaped lifting arm 502, then flows through the second rear cavity 352, the second gap 54 and the second front cavity 351 of the second right L-shaped lifting arm 502 in sequence, then enters the second rear cavity 252 between the second water stop 53 and the right water stop 35 of the second right L-shaped lifting arm 502, and then flows into the water outlet header 81 through the water outlet connecting pipe 8 corresponding to the fourth connecting port 362.

The chain suspension point position on each left L-shaped lifting arm 4 is at the end of the horizontal connecting arm 42 of the left L-shaped lifting arm 4. The chain lifting point position on each right L-shaped lifting arm 5 is at the end part of the horizontal connecting arm 52 of the right L-shaped lifting arm 5, and the chain lifting point position on each left L-shaped lifting arm 4 and the chain lifting point position on each right L-shaped lifting arm 5 are fixedly connected with the corresponding chain on the lifting driving device.

In this embodiment, as shown in fig. 2 and 3, the water inlet connecting pipe 7 is formed by a first connecting pipe 72, a middle connecting pipe 73 and a second connecting pipe 74, wherein the first connecting pipe 72 is a circular pipe structure with consistent outer pipe diameters, the middle connecting pipe 73 is a circular pipe structure with consistent outer pipe diameters, and the second connecting pipe 74 is a circular pipe structure with consistent outer pipe diameters; the outer diameter of the first connecting pipe 72 is smaller than that of the second connecting pipe 74, the outer diameter of the small end of the middle connecting pipe 73 is equal to that of the first connecting pipe 72, the outer diameter of the large end of the middle connecting pipe 73 is equal to that of the second connecting pipe 74, and the pipe wall thicknesses of the first connecting pipe 72, the middle connecting pipe 73 and the second connecting pipe 74 are all the same. The first connecting pipe 72, the middle connecting pipe 73 and the second connecting pipe 74 can be welded, sealed and spliced to form a smooth water inlet connecting pipe 7, and the first connecting pipe 72, the middle connecting pipe 73 and the second connecting pipe 74 can be integrally formed water inlet connecting pipes 7 with smooth outer surfaces.

Cooling water enters from the inlet header 71, and through the water circulation, the left semi-annular lifting ring beam 2, the right semi-annular lifting ring beam 3, the left L-shaped lifting arms 4 and the right L-shaped lifting arms 5 are cooled, so that the problem of stress concentration caused by local overheating of the movable smoke cover due to splashed slag is avoided, the service lives of the movable smoke cover lifting device and the movable smoke cover are greatly prolonged, and the service lives of the movable smoke cover lifting device and the movable smoke cover can reach about two years.

The end of the first connecting pipe 72 is fixedly connected with a throttle plate 75 in sequence, a through hole on the throttle plate 75 is composed of a cylindrical channel hole 751 and a truncated cone-shaped channel hole 752, the small end of the truncated cone-shaped channel hole 752 is the same as the aperture of the cylindrical channel hole 751, and the small end of the truncated cone-shaped channel hole 752 is in butt joint with the cylindrical channel hole 751. An inner connecting pipe 76 is arranged in the first connecting pipe 72, the inner connecting pipe 76 is fixed on the orifice plate 75, the large end of the round table-shaped channel hole 752 faces the inner connecting pipe 76, and a gap is reserved between the outer wall of the inner connecting pipe and the inner pipe wall of the first connecting pipe. The tube inner passage of the inner connection tube 76 is constituted by a cylindrical passage 761 and a truncated cone-shaped passage 762, and the large end of the truncated cone-shaped passage 762 faces the middle connection tube 73.

The cylindrical passage hole 751, the circular truncated cone-shaped passage hole 752, the cylindrical passage 761, the circular truncated cone-shaped passage 762, the internal connection pipe 76, and the first connection pipe 72 are all on the same axis. The orifice plate 75 is fixedly connected to the water outlet of the water inlet header 71 in a sealing manner, and the second connecting pipe 74 is fixedly connected to the first connecting port 261 or the second connecting port 262 in a sealing manner. The advantage of this design is that the openings to the inlet header 71 are small, the strength calculation wall thickness can be thinner, and the manufacturing cost is reduced.

The above description is only of the preferred embodiment of the present utility model, and is not intended to limit the present utility model in any other way, but any modifications or equivalent variations according to the technical spirit of the present utility model are still included in the scope of the present utility model.

Claims

1. The utility model provides a movable petticoat pipe hoisting device in converter exhaust-heat boiler, includes: the movable petticoat pipe, its characterized in that: further comprises: left semi-annular lifting ring beam and right semi-annular lifting ring beam; a plurality of left L-shaped lifting arms are circumferentially arranged at intervals at the bottom of the left semi-annular lifting ring beam, and each left L-shaped lifting arm and each left semi-annular lifting ring beam are fixedly arranged on the left outer wall of the movable smoke hood, so that each left L-shaped lifting arm and each left semi-annular lifting ring beam encircle the periphery of the left outer wall of the movable smoke hood; a plurality of right L-shaped lifting arms are circumferentially arranged at intervals at the bottom of the right semi-annular lifting ring beam, and each right L-shaped lifting arm and each right semi-annular lifting ring beam are fixedly arranged on the right outer wall of the movable smoke hood, so that each right L-shaped lifting arm and each right semi-annular lifting ring beam encircle the periphery of the right outer wall of the movable smoke hood; and cooling waterways for cooling the left semi-annular lifting ring beam, the right semi-annular lifting ring beam, the left L-shaped lifting arms and the right L-shaped lifting arms are arranged among the left semi-annular lifting ring beam, the right semi-annular lifting ring beam, the left L-shaped lifting arms and the right L-shaped lifting arms.

2. A movable hood lifting device in a converter waste heat boiler according to claim 1, characterized in that: the cooling water path has the structure that: a first water outlet is formed in the front side end surface of the left semi-annular lifting ring beam, a first water inlet is formed in the front side end surface of the right semi-annular lifting ring beam, and the first water outlet is communicated with the first water inlet through a front connecting bent pipe; a second water outlet is formed in the rear side end surface of the left semi-annular lifting ring beam, a second water inlet is formed in the rear side end surface of the right semi-annular lifting ring beam, and the second water outlet is communicated with the second water inlet through a rear connecting elbow;

3. A movable hood lifting device in a converter waste heat boiler according to claim 2, characterized in that: the deaerator is connected with a water inlet of the water inlet header through a water inlet pipeline.

4. A movable hood lifting device in a converter waste heat boiler according to claim 2, characterized in that: the left water stop plate is positioned on the vertical symmetrical central surface of the left semi-annular lifting ring beam, and the right water stop plate is positioned on the vertical symmetrical central surface of the right semi-annular lifting ring beam.

5. A movable hood lifting device in a converter waste heat boiler according to claim 1 or 2 or 3 or 4, characterized in that: the included angle alpha between the front side end face and the rear side end face of the left semi-annular lifting ring beam is 114 degrees+/-2 degrees, and the included angle beta between the front side end face and the rear side end face of the right semi-annular lifting ring beam is 114 degrees+/-2 degrees.

6. A movable hood lifting device in a converter waste heat boiler according to claim 2 or 3 or 4, characterized in that: the water inlet connecting pipe is formed into a whole by a first connecting pipe, a middle connecting pipe and a second connecting pipe, wherein the first connecting pipe is of a round pipe structure with consistent outer pipe diameters at all positions, the middle connecting pipe is of a round pipe structure, and the second connecting pipe is of a round pipe structure with consistent outer pipe diameters at all positions; the outer diameter of the first connecting pipe is smaller than that of the second connecting pipe, the outer diameter of the small end of the middle connecting pipe is equal to that of the first connecting pipe, the outer diameter of the large end of the middle connecting pipe is equal to that of the second connecting pipe, and the pipe wall thicknesses of the first connecting pipe, the middle connecting pipe and the second connecting pipe are all the same;

A throttling orifice plate is fixedly arranged at the end part of the first connecting pipe, a through hole on the throttling orifice plate is composed of a cylindrical channel hole and a truncated cone-shaped channel hole, the small end of the truncated cone-shaped channel hole is the same as the aperture of the cylindrical channel hole, and the small end of the truncated cone-shaped channel hole is in butt joint with the cylindrical channel hole; an inner connecting pipe is arranged in the first connecting pipe and is fixed on the throttling orifice plate, and a gap is reserved between the outer wall of the inner connecting pipe and the inner pipe wall of the first connecting pipe; the large end of the truncated cone-shaped channel hole faces to the inner connecting pipe; the pipe inner channel of the inner connecting pipe is composed of a cylindrical channel and a truncated cone-shaped channel, and the large end of the truncated cone-shaped channel faces the middle connecting pipe; the cylindrical channel hole, the circular truncated cone-shaped channel hole, the cylindrical channel, the circular truncated cone-shaped channel, the internal connecting pipe and the first connecting pipe are all positioned on the same axis; the orifice plate is fixedly connected to the water outlet of the water inlet header in a sealing manner, and the second connecting pipe is fixedly connected to the first connecting port or the second connecting port in a sealing manner.

7. A movable hood lifting device in a converter waste heat boiler according to claim 1, characterized in that: the top of each left L-shaped lifting arm and the top of each right L-shaped lifting arm are provided with guide wheel structures; the guide wheel structure is as follows: the top of the corresponding left L-shaped lifting arm or the corresponding right L-shaped lifting arm is provided with a guide wheel seat, a shaft sleeve is embedded in a connecting hole of a guide wheel and then movably sleeved on a guide wheel shaft, and the guide wheel shaft is supported in the guide wheel seat; in the process of lifting the movable smoke cover up and down, the guide wheel rolls along the outer wall of the flue of the furnace mouth section positioned at the movable smoke cover.

8. A movable hood lifting device in a converter waste heat boiler according to claim 1, characterized in that: the fixed mounting structure of left semi-annular lifting ring beam and right semi-annular lifting ring beam fixed mounting on the outer wall of movable smoke hood is: a plurality of first connecting plates are fixedly welded on the left semi-annular lifting ring beam and the right semi-annular lifting ring beam respectively, first lifting rib plates are fixedly welded on the outer wall of the movable smoke hood corresponding to the positions of the first connecting plates respectively, and each first connecting plate is fixedly connected with the corresponding first lifting rib plate through a plurality of first detachable bolt and nut fasteners;

Each left L-shaped lifting arm and each right L-shaped lifting arm are fixedly arranged on the outer wall of the movable smoke hood, and the fixed installation structure is as follows: a plurality of second connecting plates are fixedly welded on each left L-shaped lifting arm and each right L-shaped lifting arm respectively, second lifting rib plates are fixedly welded on the outer wall of the movable smoke hood corresponding to the positions of each second connecting plate respectively, and each second connecting plate is fixedly connected with the corresponding second lifting rib plates through a plurality of second detachable bolt and nut fasteners.

9. A movable hood lifting device in a converter waste heat boiler according to claim 8, wherein: the first lifting rib plate and the second lifting rib plate are respectively adhered with a tortoise shell net, and the tortoise shell net is coated with refractory materials.